I went to register to take the DAT and Prometric has the length of it being 5hrs 30min. I thought the time length of the DAT was 4hrs 30min.

so I went back to make sure that I clicked the right test and I did and it still same thing for the time (5hrs 30min). So then I went to the 2009 examinees' study guide and there are all the sections I've been studying and they are the length that I've been studying them which is 4hrs 30min.
Am I missing something or could it possibly be a mistake??

the test itself is 4.5 hours. you will be there longer due to signing in (finger printing), taking the tutorial before and after the test and then getting your scores.